I hope these two batsmen can play their best innings as this situation come often...if they can survive morning sessions that will be key but the way Ravi, Best, Sammy are bowling along with their spinners (if pitch starts to favor them from 4th)...it will be very challenging and most difficult tasks for our last two recognized batsmen. I agree first goal is to reach 500 and then gradually and nominally increase the expectations to bat as long as you can.